POI-TL版本：1.12.2
改造于：LoopRowTableRenderPolicy
模板设计：

分组之前：

分组之后：

代码实现：

java">word">public word">class LoopRowGroupTableRenderPolicy word">implements RenderPolicy {word">private String prefix;word">private String suffix;word">private word">boolean onSameLine;word">private TableGroupPolicy tableGroupPolicy;word">private word">final String MERGE_FLAG = "MERGE_FLAG";word">public LoopRowGroupTableRenderPolicy(TableGroupPolicy tableGroupPolicy) {word">this.prefix = "[";word">this.suffix = "]";word">this.onSameLine = false;word">this.tableGroupPolicy = tableGroupPolicy;}@Overrideword">public word">void render(ElementTemplate eleTemplate, Object data, XWPFTemplate template) {RunTemplate runTemplate = (RunTemplate) eleTemplate;XWPFRun run = runTemplate.getRun();word">try {word">if (!TableTools.isInsideTable(run)) {word">throw word">new IllegalStateException("The template tag " + runTemplate.getSource() + " must be inside a table");}XWPFTableCell tagCell = (XWPFTableCell) ((XWPFParagraph) run.getParent()).getBody();XWPFTable table = tagCell.getTableRow().getTable();run.setText("", 0);word">int templateRowIndex = getTemplateRowIndex(tagCell);List<MergeDTO> mergeList = word">new ArrayList<>();word">if (data word">instanceof Iterable) {// 对数据分组List<Map<String, String>> group = groupData((List<Map<String, String>>) data);Iterator<?> iterator = ((Iterable<?>) group).iterator();XWPFTableRow templateRow = table.getRow(templateRowIndex);word">int step = templateRow.getTableICells().size();word">int insertPosition = templateRowIndex;TemplateResolver resolver = word">new TemplateResolver(template.getConfig().copy(prefix, suffix));word">boolean firstFlag = true;word">int index = 0;word">boolean hasNext = iterator.hasNext();word">while (hasNext) {HashMap root = (HashMap) iterator.next();word">if (root.containsKey(MERGE_FLAG) && "Y".equals(root.get(MERGE_FLAG))) {word">int start = tableGroupPolicy.getFromIndex() > 0 ? tableGroupPolicy.getFromIndex() : 0;word">int end = tableGroupPolicy.getToIndex() >= step ? step - 1 : tableGroupPolicy.getToIndex();mergeList.add(word">new MergeDTO(templateRowIndex, start, end));}hasNext = iterator.hasNext();insertPosition = templateRowIndex++;XWPFTableRow nextRow = table.insertNewTableRow(insertPosition);setTableRow(table, templateRow, insertPosition);// double set rowXmlCursor newCursor = templateRow.getCtRow().newCursor();newCursor.toPrevSibling();XmlObject object = newCursor.getObject();nextRow = word">new XWPFTableRow((CTRow) object, table);word">if (!firstFlag) {// update VMerge cells for non-first rowList<XWPFTableCell> tableCells = nextRow.getTableCells();word">for (XWPFTableCell cell : tableCells) {CTTcPr tcPr = TableTools.getTcPr(cell);CTVMerge vMerge = tcPr.getVMerge();word">if (word">null == vMerge) word">continue;word">if (STMerge.RESTART == vMerge.getVal()) {vMerge.setVal(STMerge.CONTINUE);}}} word">else {firstFlag = false;}setTableRow(table, nextRow, insertPosition);RenderDataCompute dataCompute = template.getConfig().getRenderDataComputeFactory().newCompute(EnvModel.of(root, EnvIterator.makeEnv(index++, hasNext)));List<XWPFTableCell> cells = nextRow.getTableCells();cells.forEach(cell -> {List<MetaTemplate> templates = resolver.resolveBodyElements(cell.getBodyElements());word">new DocumentProcessor(template, resolver, dataCompute).process(templates);});}}word">if (!CollectionUtils.isEmpty(mergeList)) {mergeList.forEach(c -> mergeCellsHorizontal(table, c.getIndex(), c.getFromIndex(), c.getToIndex()));}table.removeRow(templateRowIndex);} word">catch (Exception e) {word">throw word">new RenderException("HackLoopTable for " + eleTemplate + " error: " + e.getMessage(), e);}}word">private List<Map<String, String>> groupData(List<Map<String, String>> data) {List<Map<String, String>> result = word">new ArrayList<>();Map<String, List<Map<String, String>>> collect = data.stream().collect(Collectors.groupingBy(map -> {word">if (map.containsKey(tableGroupPolicy.getGroupFieldName())) {word">if (StringUtils.isNotEmpty(map.get(tableGroupPolicy.getGroupFieldName()))) {word">return map.get(tableGroupPolicy.getGroupFieldName());} word">else {word">return "";}} word">else {word">return "";}}));collect.keySet().forEach(c -> {Map<String, String> map = word">new HashMap<>();map.put(MERGE_FLAG, "Y");map.put(tableGroupPolicy.getFirstFieldName(), c);result.add(map);result.addAll(collect.get(c));});word">return result;}word">private word">int getTemplateRowIndex(XWPFTableCell tagCell) {XWPFTableRow tagRow = tagCell.getTableRow();word">return onSameLine ? getRowIndex(tagRow) : (getRowIndex(tagRow) + 1);}/*** word跨列合并单元格* table 表单对象* row  合并行* fromCell 起始列* toCell  结束列*/word">private word">static word">void mergeCellsHorizontal(XWPFTable table, Integer row, Integer fromCell, Integer toCell) {word">for (word">int cellIndex = fromCell; cellIndex <= toCell; cellIndex++) {XWPFTableCell cell = table.getRow(row).getCell(cellIndex);word">if (cellIndex == fromCell) {// The first merged cell is set with RESTART merge valuecell.getCTTc().addNewTcPr().addNewHMerge().setVal(STMerge.RESTART);} word">else {// Cells which join (merge) the first one, are set with CONTINUEcell.getCTTc().addNewTcPr().addNewHMerge().setVal(STMerge.CONTINUE);}}}@SuppressWarnings("unchecked")word">private word">void setTableRow(XWPFTable table, XWPFTableRow templateRow, word">int pos) {List<XWPFTableRow> rows = (List<XWPFTableRow>) ReflectionUtils.getValue("tableRows", table);rows.set(pos, templateRow);table.getCTTbl().setTrArray(pos, templateRow.getCtRow());}word">private word">int getRowIndex(XWPFTableRow row) {List<XWPFTableRow> rows = row.getTable().getRows();word">return rows.indexOf(row);}@Dataword">public word">static word">class TableGroupPolicy {//  首字段名称word">private String firstFieldName;//  分组字段名称word">private String groupFieldName;//  合并开始下标word">private Integer fromIndex;//  合并结束下标word">private Integer toIndex;word">public TableGroupPolicy() {}word">public TableGroupPolicy(String firstFieldName, String groupFieldName, Integer fromIndex, Integer toIndex) {word">this.firstFieldName = firstFieldName;word">this.groupFieldName = groupFieldName;word">this.fromIndex = fromIndex;word">this.toIndex = toIndex;}}@Dataword">static word">class MergeDTO {//  当前下标word">private Integer index;//  合并开始下标word">private Integer fromIndex;//  合并结束下标word">private Integer toIndex;word">public MergeDTO() {}word">public MergeDTO(Integer index, Integer fromIndex, Integer toIndex) {word">this.index = index;word">this.fromIndex = fromIndex;word">this.toIndex = toIndex;}}}

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java">        Configure.builder().bind("商品列表", word">new LoopRowGroupTableRenderPolicy(word">new LoopRowGroupTableRenderPolicy.TableGroupPolicy("名称","分类",0,2)));